Agilent Technologies G4239C, Instructions Manual, Page: 5 / 12

5
Install the Valve Heads
Remove the Transportation Lock and the Valve Dummy
Install the Valve Heads
The valve drives are factory- installed in the 1290 Infinity II Multicolumn
Thermostat. The valve heads are interchangeable and can be easily mounted.
At the first installation, the transportation lock and the dummy valve have to be
removed, see
“Remove the Transportation Lock and the Valve Dummy” on page 5.
The valve heads can be installed by mounting the valve heads onto the valve
drives and fastening the nut manually (do not use any tools).
Be sure that the guide pin snaps into the groove of the valve drive thread.
1
When unscrewing the transportation lock, push it back until the
last screw is removed - the valve rail is spring-loaded.
2
Press on the valve dummy to release it (spring-loaded valve
rail).
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3 4
Remove the Transportation Lock and the Valve Dummy
N O T E
Following procedures may show the 1290 Infinity TCC. The MCT uses the same valve heads, the
valve head installation is the same.
N O T E
The valves are mounted on pull-out rails to allow easy installation of capillaries. Push the valve
gently into its housing until it snaps into the inner position, push it again and it slides out.
When all capillaries are installed, push the valve back into its housing, see “Install the Valve Head
and Connect Capillaries” on page 6.